Exercise 14.1 QUESTION 1 Sol : Hence , the roots of the equation are i and -i    QUESTION 2 Sol : Hence, the roots of the equation are   QUESTION 3 Sol :  […]

## Rd sharma solution of class 11 chapter 13 complex number

Exercise 13.3 QUESTION 1 (i) Sol : , and   (ii) Sol : ,   , ṇṇ   (iii) Sol : , ,   (iv) Sol : , ,   (v) Sol : , ,[…]

## Rd sharma solution of chapter 13 complex number class 11

Exercise 13.2 QUESTION 1 Express the following complex numbers in the standard form a+ib : (i) Sol :   (ii) Sol :   (iii) Sol :     (iv) Sol :     (v) Sol[…]

## Rd sharma solution of chapter 13 Complex numbers

Complex numbers Exercise 13.1 QUESTION 1 Evaluate the following: (i) Sol :   (ii) Sol : =1   (iii) Sol : = -1   (iv) Sol :     (v) Sol :   = 0[…]

## Hydrocarbons

HYDROCARBONS Organic compound are composed of only carbons and hydrogen are called hydrocarbons. ON THE BASIS OF STRUCTURE HYDROCARBONS ARE OF TWO TYPES  1. Acyclic or open chain hydrocarbons 2. Cyclic or closed chain hydrocarbons[…]

## WORK, ENERGY AND POWER

WORK, ENERGY AND POWER In your daily life you have seen many things like person pushing heavy box , a teacher teaching students , mom cooking food , all are said to be working .[…]

## REDOX REACTIONS

REDOX REACTIONS Chemical reaction in which electron transfer from one chemical substance to another are termed as oxidation-reduction reactions or redox reactions. You can see many examples from your daily life like production of electricity[…]

## Thermodynamics

Thermodynamics The word “thermodynamics” is derived from Greek words therme (heat) and dinamics (flow or motion) . Thermodynamics mainly deals with the transformation of heat into mechanical energy and vice versa .   LIMITATIONS OF THERMODYNAMICS[…]

## straight line

Straight line EXERCISE 23.1 1. Find the slopes of the lines which make the following angles with the positive direction of x-axis : (i) ​$$-\dfrac{\pi}{4}$$​ sol: m=tan​$$\theta$$​ =tan(​$$-\dfrac{\pi}{4}$$​)  = -1[…]

## Chapter Some Basic Concepts of Chemistry

SOME BASIC CONCEPT OF CHEMISTRY Classification of matter on the basis of chemical properties: Matter classified into two groups pure substances and mixtures.Pure substances further divided into elements and compounds. 1. Elements : it is[…]

## Chapter classification of elements and periodicity in properties

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN  PROPERTIES Brief Historical Development Of Periodic Table 1.Johann Dobereiner’s (Law of triads) In between 1815 and 1829 he gave law of triads.According to which group of three elements which[…]